+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   212314 (2005 QU42) Classification: Outer Main-belt Asteroid          SPK-ID: 2212314 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1475618038383958 6.3319e-08   a 3.219132602630134 3.6644e-08 au q 2.744111588991041 2.0003e-07 au i 5.218176651642192 7.5739e-06 deg node 18.40241788220889 5.4632e-05 deg peri 315.2492218648256 5.895e-05 deg M 240.9268074021043 2.5957e-05 deg tp 2459898.279528611266 (2022-Nov-14.77952861) 0.00015996 TDB period 2109.632107945134 5.78 3.6022e-05 9.862e-08 d yr n .1706458669472254 2.9137e-09 deg/d Q 3.694153616269227 4.2051e-08 au   Orbit Determination Parameters    # obs. used (total)      413      data-arc span      7562 days (20.70 yr)      first obs. used      1999-09-07      last obs. used      2020-05-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56788      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 04:01:50   Additional Information  Earth MOID = 1.73557 au   Jupiter MOID = 1.69983 au   T_jup = 3.166  [ hide covariance matrix ] Orbital Elements at Epoch 2457127.5 (2015-Apr-15.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1458640867438949 6.3342e-08   q 2.750487257857636 1.999e-07 au tp 2457787.779385938396 (2017-Feb-03.27938594) 0.00013951 TDB node 18.44090653591914 5.4631e-05 deg peri 315.3587899956977 5.904e-05 deg i 5.217385135106464 7.5718e-06 deg   Orbit Determination Parameters    # obs. used (total)      413      data-arc span      7562 days (20.70 yr)      first obs. used      1999-09-07      last obs. used      2020-05-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56788      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 04:01:50   Additional Information  Jupiter MOID = 1.69983 au   T_jup = 3.166  Orbit Covariance (6×6)   e q tp node peri i e 4.012261876480706E-15 -1.251357910221201E-14 4.196876756814071E-12 5.859939657488229E-15 6.077399791332749E-13 8.645933804598315E-16 q -1.251357910221201E-14 3.995806579662245E-14 -1.122247068296857E-11 -2.127605200443534E-14 -1.637199931616364E-12 1.032067376849602E-15 tp 4.196876756814071E-12 -1.122247068296857E-11 1.94628453756705E-8 1.150592413883001E-11 3.130437286021922E-9 2.584222015255098E-12 node 5.859939657488229E-15 -2.127605200443534E-14 1.150592413883001E-11 2.984522216530833E-9 -2.969860841084895E-9 -6.233454841504168E-11 peri 6.077399791332749E-13 -1.637199931616364E-12 3.130437286021922E-9 -2.969860841084895E-9 3.485684212652559E-9 6.244352775060039E-11 i 8.645933804598315E-16 1.032067376849602E-15 2.584222015255098E-12 -6.233454841504168E-11 6.244352775060039E-11 5.733172890761524E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.97   n/a E2020-QN2   212314 (2005 QU42)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa Reference: 20090409/Numbers.arc Last Updated: 2009-04-10 [ show close-approach data ] Alternate Designations  2005 QU42 = 1999 RH254  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 22:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin